package com.atguigu.service.impl;

import com.atguigu.dao.BookDao;
import com.atguigu.dao.OrderDao;
import com.atguigu.dao.OrderItemDao;
import com.atguigu.dao.impl.BookDaoImpl;
import com.atguigu.dao.impl.OrderDaoImpl;
import com.atguigu.dao.impl.OrderItemDaoImpl;
import com.atguigu.pojo.*;
import com.atguigu.service.OrderService;

import java.util.Date;
import java.util.Map;

/**
 * @ClassName OrderServiceImpl
 * @Description TODO
 * @Author lmy
 * @Date 2022/4/2 17:32
 **/
public class OrderServiceImpl implements OrderService {
    private OrderDao orderDao=new OrderDaoImpl();
    private OrderItemDao orderItemDao=new OrderItemDaoImpl();
    private BookDao bookDao=new BookDaoImpl();
    @Override
    public String create0rder(Cart cart, Integer userId) {
        //订单号==唯一性
        String orderId=System.currentTimeMillis()+""+userId;
        //创建一个订单对象
        Order order=new Order(orderId,new Date(),cart.getTotalPrice(),0,userId);
        //保存订单
        orderDao.saveOrder(order);
        //遍历购物车中每一商品项转换成为订单项保存到数据库
        for (Map.Entry<Integer, CartItem>entry: cart.getItems().entrySet())
        {
            //获取每一个购物车中的商品项
            CartItem cartItem=entry.getValue();
            //转换为每一个订单项
            OrderItem orderItem=new OrderItem(null,cartItem.getName(), cartItem.getCount(), cartItem.getPrice(),cartItem.getTotalPrice(),orderId);
            //保存订单向到数据库
            orderItemDao.saveOrderItem(orderItem);

            //更新库存和销量
            Book book = bookDao.queryBookById(cartItem.getId());
            book.setSales(book.getSales()+cartItem.getCount());
            book.setStock(book.getStock()-cartItem.getCount());
            bookDao.updateBook(book);
        }
        //清空购物车
        cart.clear();
        return  orderId;
    }
}
